If you are on a multi-lane road and you are being passed on the right, take that as a sign that you should move over as soon as it's safe to do so.
If you continue at the speed you are travelling, in the lane you're in, you are creating a hazard. You are causing a disturbance in the flow of traffic and increasing the chance of a collision between cars passing you on the left and right trying to merge again in front of you. And, you are increasing the annoyance of the drivers who feel that you are in their way. We have enough annoyed drivers on the road already.
Yes, I know, speed limits and all that. Better to let the loons be stupid smoothly and have their accidents on their own than be partially responsible for them yourself.
Please, don't add to the angst and annoyance on the road, if you are being passed on the right, move over, get out of the way, save everyone the headaches (or worse).
BTW, I often have to follow my own advice. My truck generally does not like going fast.